Concrete-mixer.



A1\To.886,680.'

PATENTED MAY 5, 1908. J. F. GROWE.

CONCRETE MIXER.

APPLICATION. FILED MAR. 1 8, 1907.v

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JAMES F. GROWE, OF BURNSIDE, KENTUCKY.

CONCRETE-MIXER.

Specification of Letters Patent.

Patented May 5, 1908.

Application filed March 18, 1907` Serial No, 362,810.

To all whom it may concern;

Be it known that I, JAMES F. Cnown, a citizen of the United States,residing at Burnside, in the county of Pulaski and State of Kentucky,have invented certain new and useful Improvements in Concrete- Mixers,of which the following is a specification.

My invention relates to improvements in concrete mixers.

One of its objects is to provide a mixer which can be conveniently movedfrom place to lace to receive the different ingredients anc to depositthe concrete when mixed at the place required.

Another object is to provide simple and reliable means for eectuallymixing the ingredients.

Another object is to provide a mixer in which the mixing operation iseffected during the operation of transporting the concrete to the placeWhere it is to be deposited.

Another object is to provide a more simple and less expensive mixer.

It further consists in certain details of form, combination andarrangement, all of which will be more fully set forth in thedescription of the accompanying drawings, in which:

Figure l is a side elevation of my improved mixer. Fig. 2 is an end viewof the mixing chamber and its supporting and driving mechanism. Fig. 3is a section through the mixing chamber on line z z of Fig. 1. Fig. 4 isa sectional detail taken through the mixing chamber supporting anddriving mechanism on line o c of Fig. 2.

In the accompanying drawings A represents the mast and A the boom of acrane or derrick, which serves to support and convey the mixing chamberB to the various positions required, the movements being effected bymeans of an engine or motor C driving a plurality of drums c c.

The mixing chamber B consists preferably of a rectangular sheet metalshell, and is preferably provided with doors l) at o posite sides. Thedoors b are adapted to be held closed by appropriate latch mechanism,which can be conveniently released to discharge the concrete. The latchmechanism shown comprises lugs b carried by the doors, latches b2 hingedto the shell and adapted to engage lugs b', and a strap b3 pivoted toboth latches and provided with a handle b4 by means of which bothlatches are simultaneously shifted to latch or release the door.

D represents a shaft or rod passing axially through the chamber B, andupon which the chamberB journals by means of journal boxes d, which areattached to the sheet metal shell and preferably provided with packingglands d to prevent the concrete getting in-to the bearings.

E represents a series of mixing blades carried within chamber B by shaftD, the greater number of blades being preferably arranged to standvertically so as not to interfere with the introduction of thematerials.

F represents a yoke frame suspended by means of a cable li" which passesover a sheavej1 at the free end of the boom A. One end and preferablyboth ends f4 of the yoke E are jointed at f so that the lower ends canbe swung outwardly as indicated in dotted line at the left of Fig. 1.

f2 represents ngers and f3 lugs or stops which prevent the pivoted lowerends fif of the yoke from swinging in the opposite direction.

The ends of shaft D are secured in eyes f6 f7 in the ends of the yokepieces f4 f5 in such manner as to prevent the shaft from turningrelative to the yoke, and also preferably so that by swinging saidpieces outwardly the shaft may be freed therefrom. As shown the ends ofthe shaft D are attened on oppositesides and are secured incorrespondingly shaped eyes in pieces f4L f5; keys f8 passing throughthe ends of the shaft to lock the parts in place.

G represent hubs projecting inwardly from the ends of arms f4 f5 whichhubs serve as journals for sprocket wheels g g. Projecting from the faceof sprocket wheels g g are clutch members g2 g3 which engage clutchmembers g4 projecting from journal boxes d of the chamber B.

H represents a shaft journaled in the up per portion of yoke F andprovided with sprocket wheels h h which by means of sprocket chains h2h3 serve to drive the sprocket wheels g g and through clutch members g2g3 g4 to drive or rotate the chamber B. Sprocket wheels g g are held inplace on the hubs G by lock nuts g5. Shaft H also carries two drums I I,about which are wound in reverse directions the ends of cables '11i'.Cables i i pass thence over the sheaves 712713 on the boom and sheavesi4 'i5 on the mast, and their opposite ends are similarly wound on drumsc. Cable F is also preferably wound on a drum of the same diametercarried on the same shaftas drum c. Cable F may however if desired bewound upon an independently controlled drum on a separate shaft. A cableJ is attached at one end to the free end of boom A and passes thenceover sheaves y' j and thence to drum c.

The operation is as follows; the chamber B being adjusted to the desiredheight to receive the materials and so as to swing free from the ground,and the upper door l) opened, is shifted successively todierentpositions to receive the sand, cement, crushed stone, and water, orother ingredients. Then the door b is closed and latched and drum c, andalso if desired drum c rotated to elevate the chamber B, the cables i t"causing shaft H to rotate, which in turn rotates chamber B upon its axleD through sprocket wheels 7L h g g and clutch members g2 g3 g4, whichserves to mix the ingredients in chamber B, Chamber B is then shiftedand lowered over the place where the concrete is to be deposited, thelowering of chamber B causing said chamber to rotate in the oppositedirection, and thus to further mix the concrete. The latch of the lowerdoor is then released and the concrete deposited. Where cable F is woundupon a separate and inde pendently controlled drum, the chamber B may berotated by rotating the drum c without elevating the chamber if sodesired.

The mechanism herein illustrated and described is capable ofconsiderable modification without departing from the principle of myinvention, the scope of which will be defined by the claims.

Having described my invention, what I claim is:

l. In a mechanism of the character indicated, a derrick mast and boom, ayoke frame suspended by a cable passing over a pulley at the free end ofsaid boom, whereby the yoke frame is adapted to be elevated and lowered,a drum carried by and journaled to said yoke, separate cables passincrover pulleys at the free end of said boom and wound in oppo sitedirections on said drum, a mixing chamber journaling upon a non-rotatingshaft carried by said yoke, sprocket wheels at opposite ends of saiddrum shaft adapted to be driven by the winding and unwinding of thecables wound on said drum, sprocket wheels loosely journaling on saidnon-rotating shaft and adapted to rotate the mixing chamber, andsprocket chains transmitting motion from said drum shaft to said mixingchamber.

2. In a mechanism of the character indicated, in combination with aderrick mast and boom, a yoke frame comprising a suspended main ormiddle section and two hinged downwardly projectin end sections, a drumjournaled lto said mid le section and provided with actuating cablesoppositely wound thereon, a non-rotating shaft detachably locked to-saidhinged yoke sections a mixing chamber'journaled upon said nonrotatingshaft, sprocket wheels loosely journaled upon said non-rotating shaft,and clutched to said mixing chamber, sprocket wheels carried by saiddrum shaft and adapted to be driven by the winding and unwinding ofsaidV cables upon said drum, and sprocket chains transmitting motionfrom said drum shaft to said mixing chamber.

3. In a mechanism of the character indicated, a derrick mast andboom,pulleys carried by said boom, a yoke frame suspended from said boom by acable passing over one of said pulleys carried by said boom to raise andlower said yoke frame, a drum journaled to said yoke frame and adaptedto be rotated in opposite directions by means of separate cablesoppositely wound on said drumand passing over pulleys carried by saidboom, a non-rotating shaft locked to said yoke frame, a mixing chamber journaled on said non-rotating shaft, and mechanism transmitting motionfrom said drum to said mixing chamber to rotate the same.

4. In a mechanism of the character indicated, a derrick mast and boom,pulleys carried by said boom, a yoke frame suspended from the end ofsaid boom by a cable passing over one of said pulleys at the end of saidboom to raise and lower said yoke frame, a drum ournaled to saidyokeframe and adapted to be rotated in opposite directions by means ofseparate cables oppositely wound on said drum and passing over pulleysat the end of said boom, a non-rotating shaft armed with mixer bladeslocked to said yoke frame, a mixing chamber journaled on saidnon-rotating shaft, and mechanism transmitting motion from said drum tosaid mixing cham'- ber to rotate the same.

5. In a mechanism of the character indicated, power driven suspendingand transporting mechanism, a yoke frame suspended thereby, one of thearms of said yoke frame being pivotally connected to the back thereof anaxle carried rigidly by the extended ends of said yoke frame, a mixingchamber journaled upon `said axle, a clutch member carried by saidchamber, a motor, and a clutch member actuated by said motor and adaptedY JAMES F. CROWE.

Witnesses:

MICHAEL R. Fox, GEORGE T. HoRINE.

